Supersonic active noise reduction in small- and moderate-scale nozzles

Jessica Morgan, Dennis K. McLaughlin, Philip John Morris

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Supersonic tactical aircraft engines create a high amplitude noise environment. Penn State has developed an on-demand noise reduction method that uses fluidic inserts. These inserts inject steady secondary air into the diverging section of a converging-diverging nozzle. The fluidic inserts generate streamwise vortices that break up the large scale turbulence structures that are the primary source of noise. In addition shock noise is reduced by the effective area ratio change of the nozzle. The fluidic insert noise reduction method has shown up to a 5 dB noise benefit in the peak noise direction in laboratory small-scale testing. In preparation for eventual full-scale implementation, the fluidic insert noise reduction method was tested on a moderate-scale nozzle to demonstrate scalability and Reynolds number independence. The moderate-scale nozzle is five times larger than the small-scale nozzles tested at Penn State. The experiments at moderate-scale were conducted in collaboration with GE Aviation in The Cell 41 facility at Evendale, OH. Four different fluidic insert geometries were tested and compared for noise reduction between the two scale sizes.

Original languageEnglish (US)
Title of host publicationAIAA Aerospace Sciences Meeting
PublisherAmerican Institute of Aeronautics and Astronautics Inc, AIAA
Edition210059
ISBN (Print)9781624105241
DOIs
StatePublished - Jan 1 2018
EventAIAA Aerospace Sciences Meeting, 2018 - Kissimmee, United States
Duration: Jan 8 2018Jan 12 2018

Publication series

NameAIAA Aerospace Sciences Meeting, 2018
Number210059

Other

OtherAIAA Aerospace Sciences Meeting, 2018
CountryUnited States
CityKissimmee
Period1/8/181/12/18

Fingerprint

Fluidics
Noise abatement
Nozzles
Supersonic aircraft
Aircraft engines
Aviation
Scalability
Vortex flow
Reynolds number
Turbulence
Geometry
Testing
Air
Experiments

All Science Journal Classification (ASJC) codes

  • Aerospace Engineering

Cite this

Morgan, J., McLaughlin, D. K., & Morris, P. J. (2018). Supersonic active noise reduction in small- and moderate-scale nozzles. In AIAA Aerospace Sciences Meeting (210059 ed.). (AIAA Aerospace Sciences Meeting, 2018; No. 210059). American Institute of Aeronautics and Astronautics Inc, AIAA. https://doi.org/10.2514/6.2018-0259
Morgan, Jessica ; McLaughlin, Dennis K. ; Morris, Philip John. / Supersonic active noise reduction in small- and moderate-scale nozzles. AIAA Aerospace Sciences Meeting. 210059. ed. American Institute of Aeronautics and Astronautics Inc, AIAA, 2018. (AIAA Aerospace Sciences Meeting, 2018; 210059).
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Morgan, J, McLaughlin, DK & Morris, PJ 2018, Supersonic active noise reduction in small- and moderate-scale nozzles. in AIAA Aerospace Sciences Meeting. 210059 edn, AIAA Aerospace Sciences Meeting, 2018, no. 210059, American Institute of Aeronautics and Astronautics Inc, AIAA, AIAA Aerospace Sciences Meeting, 2018, Kissimmee, United States, 1/8/18. https://doi.org/10.2514/6.2018-0259

Supersonic active noise reduction in small- and moderate-scale nozzles. / Morgan, Jessica; McLaughlin, Dennis K.; Morris, Philip John.

AIAA Aerospace Sciences Meeting. 210059. ed. American Institute of Aeronautics and Astronautics Inc, AIAA, 2018. (AIAA Aerospace Sciences Meeting, 2018; No. 210059).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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Morgan J, McLaughlin DK, Morris PJ. Supersonic active noise reduction in small- and moderate-scale nozzles. In AIAA Aerospace Sciences Meeting. 210059 ed. American Institute of Aeronautics and Astronautics Inc, AIAA. 2018. (AIAA Aerospace Sciences Meeting, 2018; 210059). https://doi.org/10.2514/6.2018-0259